UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) July 24, 2017

TIDEWATER INC.

(Exact name of registrant as specified in its charter)

(504) 568-1010

(Registrant’s telephone number, including area code)

N/A

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2).        Emerging growth company    ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised accounting standards provided pursuant to Section 13(a) of the Exchange Act.    ☐

Item 7.01. Regulation FD Disclosure.

As previously disclosed, on May 17, 2017, Tidewater Inc. (the “Company”) and certain of its subsidiaries filed voluntary petitions for relief under chapter 11 of title 11 of the United States Code in the United States Bankruptcy Court for the District of Delaware (the “Bankruptcy Cases,” and such court, the “Bankruptcy Court”). On July 17, 2017, the Bankruptcy Court issued a written order (the “Confirmation Order”) approving the Second Amended Joint Prepackaged Chapter 11 Plan of Reorganization of the Debtors, as modified by the Confirmation Order (the “Plan”).

As required by the rules of the Bankruptcy Court, on July 24, 2017, the Company filed its monthly operating report for the period beginning June 1, 2017 and ending June 30, 2017 (the “Monthly Operating Report”) with the Bankruptcy Court. The Monthly Operating Report is attached hereto as Exhibit 99.1. This Current Report on Form 8-K (including the exhibit hereto) is not an admission by the Company that the information set forth in the Monthly Operating Report is material.

The information included in this Current Report on Form 8-K under Item 7.01 and Exhibit 99.1 is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to liabilities of that Section, unless the registrant specifically states that the information is to be considered “filed” under the Exchange Act or specifically incorporates it by reference into a filing under the Exchange Act or the Securities Act of 1933, as amended.

Cautionary Statement Regarding the Monthly Operating Report

The Company cautions investors and potential investors not to unduly rely on the information contained in the Monthly Operating Report, which was not prepared or reviewed for the purpose of facilitating an investment decision relating to any of the securities of the Company. The Monthly Operating Report has been prepared solely for the purpose of complying with the reporting requirements of the Bankruptcy Court. The Monthly Operating Report was not audited or reviewed by independent accountants, was not prepared in accordance with generally accepted accounting principles in the United States, is in a format prescribed by applicable bankruptcy laws, and is subject to future adjustment and reconciliation. No assurance is given that, from the perspective of an investor or potential investor in the Company’s securities, the Monthly Operating Report is complete.

Cautionary Note Regarding Forward-Looking Statements

In accordance with the safe harbor provisions of the Private Securities Litigation Reform Act of 1995, the Company notes that certain statements set forth in this Current Report on Form 8-K provide other than historical information and are forward looking. The actual achievement of any forecasted results, or the unfolding of future economic or business developments in a way anticipated or projected by the Company, involve numerous risks and uncertainties that may cause the Company’s actual performance to be materially different from that stated or implied in the forward-looking statement. Among those risks and uncertainties, many of which are beyond the control of the Company, including, without limitation, the ability to satisfy the conditions necessary to declare the Plan effective in the anticipated timeframe; effects on the market price of the Company’s common stock and on the Company’s ability to access the capital markets; volatility in worldwide energy demand and oil and gas prices, and continuing depressed levels of oil and gas prices, without a clear indication of if, or when, prices will recover to a level to support renewed offshore exploration activities; consolidation of our customer base; fleet additions by competitors and industry overcapacity; our views with respect to the need for and timing of the replenishment of our asset base, including through acquisitions or vessel construction; changes in capital spending by customers in the energy industry for offshore exploration, field development and production;

2

loss of a major customer; changing customer demands for vessel specifications, which may make some of our older vessels technologically obsolete for certain customer projects or in certain markets; delays and other problems associated with vessel construction and maintenance; uncertainty of global financial market conditions and difficulty in accessing credit or capital; potential difficulty in meeting financial covenants in material debt or other obligations of the Company or in obtaining covenant relief from lenders or other contract parties; acts of terrorism and piracy; integration of acquired businesses and entry into new lines of business; disagreements with our joint venture partners; significant weather conditions; unsettled political conditions, war, civil unrest and governmental actions, such as expropriation or enforcement of customs or other laws that are not well developed or consistently enforced, or requirements that services provided locally be paid in local currency, in each case especially in higher political risk countries where we operate; foreign currency fluctuations; labor changes proposed by international conventions; increased regulatory burdens and oversight; changes in laws governing the taxation of foreign source income; retention of skilled workers; enforcement of laws related to the environment, labor and foreign corrupt practices; and the resolution of pending legal proceedings. Readers should consider all of these risk factors as well as other information contained in this report.

Item 9.01. Financial Statements and Exhibits.

(d) The exhibit to this Current Report on Form 8-K is listed in the Exhibit Index, which appears at the end of this report and is incorporated into this Form 8-K by reference.

3

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: July 24, 2017

EXHIBIT INDEX

4